/*
 * Copyright 2010 - Jeremie Brebec
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.jb.room.server.user.impl;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.jb.room.server.user.RoomUsersNotifier;
import org.jb.user.client.UserLogin;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;

@Singleton
public class RoomUsersFilter implements Filter {

	@Inject
	private Provider<RoomUsersNotifier> roomUsersNotifier;
	
	@Inject @UserLogin
	private Provider<String> user;
	
	@Override
	public void destroy() {}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		
		String userName = user.get();
		
		if (userName != null) {
			roomUsersNotifier.get().notifyActivity(userName);
		}
		
		chain.doFilter(request, response);

	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {}

}
